Аннотация:The effect of magnetic pulse treatment on the magnetic structure of foil from the amorphous alloy Fe73(SiBNb)27 with the addition of 1% copper was studied. The foil was produced by ultra-fast cooling by spraying the melt on a rapidly rotating copper drum. It was discovered that, as a result of exposure to weak magnetic field pulses, a domain structure appears in the material under study. The nature of the domain structure and magnetic characteristics of the foil depend on the parameters of magnetic pulse processing